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/*******************************************************************************
uBlock Origin - a comprehensive, efficient content blocker
Copyright (C) 2019-present Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
import { getExceptionTokenFn } from './utils.js';
import { registerScriptlet } from './base.js';
import { safeSelf } from './safe-self.js';
/******************************************************************************/
export function matchesStackTraceFn(
needleDetails,
logLevel = ''
) {
const safe = safeSelf();
const exceptionToken = getExceptionTokenFn();
const error = new safe.Error(exceptionToken);
const docURL = new URL(self.location.href);
docURL.hash = '';
// Normalize stack trace
const reLine = /(.*?@)?(\S+)(:\d+):\d+\)?$/;
const lines = [];
for ( let line of safe.String_split.call(error.stack, /[\n\r]+/) ) {
if ( line.includes(exceptionToken) ) { continue; }
line = line.trim();
const match = safe.RegExp_exec.call(reLine, line);
if ( match === null ) { continue; }
let url = match[2];
if ( url.startsWith('(') ) { url = url.slice(1); }
if ( url === docURL.href ) {
url = 'inlineScript';
} else if ( url.startsWith('<anonymous>') ) {
url = 'injectedScript';
}
let fn = match[1] !== undefined
? match[1].slice(0, -1)
: line.slice(0, match.index).trim();
if ( fn.startsWith('at') ) { fn = fn.slice(2).trim(); }
let rowcol = match[3];
lines.push(' ' + `${fn} ${url}${rowcol}:1`.trim());
}
lines[0] = `stackDepth:${lines.length-1}`;
const stack = lines.join('\t');
const r = needleDetails.matchAll !== true &&
safe.testPattern(needleDetails, stack);
if (
logLevel === 'all' ||
logLevel === 'match' && r ||
logLevel === 'nomatch' && !r
) {
safe.uboLog(stack.replace(/\t/g, '\n'));
}
return r;
}
registerScriptlet(matchesStackTraceFn, {
name: 'matches-stack-trace.fn',
dependencies: [
getExceptionTokenFn,
safeSelf,
],
});
/******************************************************************************/
function abortOnStackTrace(
chain = '',
needle = ''
) {
if ( typeof chain !== 'string' ) { return; }
const safe = safeSelf();
const needleDetails = safe.initPattern(needle, { canNegate: true });
const extraArgs = safe.getExtraArgs(Array.from(arguments), 2);
if ( needle === '' ) { extraArgs.log = 'all'; }
const makeProxy = function(owner, chain) {
const pos = chain.indexOf('.');
if ( pos === -1 ) {
let v = owner[chain];
Object.defineProperty(owner, chain, {
get: function() {
const log = safe.logLevel > 1 ? 'all' : 'match';
if ( matchesStackTraceFn(needleDetails, log) ) {
throw new ReferenceError(getExceptionTokenFn());
}
return v;
},
set: function(a) {
const log = safe.logLevel > 1 ? 'all' : 'match';
if ( matchesStackTraceFn(needleDetails, log) ) {
throw new ReferenceError(getExceptionTokenFn());
}
v = a;
},
});
return;
}
const prop = chain.slice(0, pos);
let v = owner[prop];
chain = chain.slice(pos + 1);
if ( v ) {
makeProxy(v, chain);
return;
}
const desc = Object.getOwnPropertyDescriptor(owner, prop);
if ( desc && desc.set !== undefined ) { return; }
Object.defineProperty(owner, prop, {
get: function() { return v; },
set: function(a) {
v = a;
if ( a instanceof Object ) {
makeProxy(a, chain);
}
}
});
};
const owner = window;
makeProxy(owner, chain);
}
registerScriptlet(abortOnStackTrace, {
name: 'abort-on-stack-trace.js',
aliases: [
'aost.js',
],
dependencies: [
getExceptionTokenFn,
matchesStackTraceFn,
safeSelf,
],
});
/******************************************************************************/
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